CVE-2026-35578Public exploitNetwork attack vector

Authenticated open redirect via unvalidated linkBack parameter

Published Apr 7, 2026 · Updated Apr 7, 2026

Open redirect in ChurchCRM before 7.0.0 allows remote authenticated users to send other authenticated users to attacker-chosen sites. DonatedItemEditor.php and other pages use the unvalidated linkBack URL parameter as the Cancel button destination. The redirect requires a logged-in victim to open a crafted page and click Cancel; CVE-2026-35578 is rejected as a duplicate of CVE-2026-39940.

CVSS severity5.3
Medium
EPSS probabilityUnavailable
No score available in this record
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Open redirect in ChurchCRM before 7.0.0 allows remote authenticated users to send other authenticated users to attacker-chosen sites. DonatedItemEditor.php and other pages use the unvalidated linkBack URL parameter as the Cancel button destination. The redirect requires a logged-in victim to open a crafted page and click Cancel; CVE-2026-35578 is rejected as a duplicate of CVE-2026-39940.

The record

CVE
CVE-2026-35578
Published
Apr 7, 2026
Updated
Apr 7, 2026
Vendor
ChurchCRM
Product
ChurchCRM
Classifications
CWE-601, T1204.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 7, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 7.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ChurchCRM · ChurchCRMversion=< 7.0.0

Published CVSS scores

5.3GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-601URL Redirection to Untrusted Site ('Open Redirect')
T1204.001User Execution: Malicious Link

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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